alright i have a 95 zj laredo v8 4x4 all time that has been idling at 500 rpm in drive and 700 rpm typically in park. i cleaned my IAC sensor a couple of days ago, and it idled a little better. but yesterday i put in some gumout fuel cleaner and it began to idle at about 1000 rpm in drive and 1500 rpm in park. i feel like thats really high, any ideas whats wrong?
If you took the TB off to clean the IAC then pretty much any one that connects to it. There's also a big one that goes from the PCV valve to the passenger side of the intake, a lot of oil fumes go through that and over time, it pretty much disintegrates. You'll more or less have to check all the connections one by one, no easy way that I'm aware of.
Originally Posted by zj97ltd View Post
Last time I unscrewed it all the way and gave the innards a good squirt of white lithium grease.
Maybe true for some IACs. I've had three in my ZJ and none of them seemed to mind. IMS the Haynes manual tells you to push the plunger in as part of testing the IAC but I could be mistaken. Both the IACs I bought said to push the plunger back to make sure it didn't jam on the housing when you install it.
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